1 /* 2 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file COPYING in the main directory of this archive 6 * for more details. 7 */ 8 9#include <linux/types.h> 10#include <linux/kernel.h> 11#include <linux/sched.h> 12#include <linux/kernel_stat.h> 13#include <linux/interrupt.h> 14#include <asm/segment.h> 15#include <asm/intersil.h> 16#include <asm/oplib.h> 17#include <asm/sun3ints.h> 18#include <asm/irq_regs.h> 19#include <linux/seq_file.h> 20 21extern void sun3_leds (unsigned char); 22 23void sun3_disable_interrupts(void) 24{ 25 sun3_disable_irq(0); 26} 27 28void sun3_enable_interrupts(void) 29{ 30 sun3_enable_irq(0); 31} 32 33static int led_pattern[8] = { 34 ~(0x80), ~(0x01), 35 ~(0x40), ~(0x02), 36 ~(0x20), ~(0x04), 37 ~(0x10), ~(0x08) 38}; 39 40volatile unsigned char* sun3_intreg; 41 42void sun3_enable_irq(unsigned int irq) 43{ 44 *sun3_intreg |= (1 << irq); 45} 46 47void sun3_disable_irq(unsigned int irq) 48{ 49 *sun3_intreg &= ~(1 << irq); 50} 51 52static irqreturn_t sun3_int7(int irq, void *dev_id) 53{ 54 *sun3_intreg |= (1 << irq); 55 if (!(kstat_cpu(0).irqs[irq] % 2000)) 56 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]); 57 return IRQ_HANDLED; 58} 59 60static irqreturn_t sun3_int5(int irq, void *dev_id) 61{ 62#ifdef CONFIG_SUN3 63 intersil_clear(); 64#endif 65 *sun3_intreg |= (1 << irq); 66#ifdef CONFIG_SUN3 67 intersil_clear(); 68#endif 69 do_timer(1); 70#ifndef CONFIG_SMP 71 update_process_times(user_mode(get_irq_regs())); 72#endif 73 if (!(kstat_cpu(0).irqs[irq] % 20)) 74 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]); 75 return IRQ_HANDLED; 76} 77 78static irqreturn_t sun3_vec255(int irq, void *dev_id) 79{ 80// intersil_clear(); 81 return IRQ_HANDLED; 82} 83 84static void sun3_inthandle(unsigned int irq, struct pt_regs *fp) 85{ 86 *sun3_intreg &= ~(1 << irq); 87 88 __m68k_handle_int(irq, fp); 89} 90 91static struct irq_controller sun3_irq_controller = { 92 .name = "sun3", 93 .lock = __SPIN_LOCK_UNLOCKED(sun3_irq_controller.lock), 94 .startup = m68k_irq_startup, 95 .shutdown = m68k_irq_shutdown, 96 .enable = sun3_enable_irq, 97 .disable = sun3_disable_irq, 98}; 99 100void __init sun3_init_IRQ(void) 101{ 102 *sun3_intreg = 1; 103 104 m68k_setup_auto_interrupt(sun3_inthandle); 105 m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7); 106 m68k_setup_user_interrupt(VEC_USER, 128, NULL); 107 108 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL)) 109 pr_err("Couldn't register %s interrupt\n", "int5"); 110 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL)) 111 pr_err("Couldn't register %s interrupt\n", "int7"); 112 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) 113 pr_err("Couldn't register %s interrupt\n", "vec255"); 114} 115